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Income Taxes. (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income Taxes. (Details) [Line Items] |  |
Federal net operating losses | $ 77,500,000 |
Capital loss, description | Federal capital loss of $113,928,000 may be carried forward for 5 years and will expire in 2025. State capital loss of $110,279,000 may be carried forward for 5 years for most of the states in which the Company files returns and will expire in 2025. |
Valuation allowance | $ 85,688,000 | $ 84,065,000
Increase in valuation allowance | 1,623,000 | 43,477,000
Additional net operating losses |  | $ 22,641,000
Disallowed depreciation | 20,836,000 |
Federal [Member] |  |
Income Taxes. (Details) [Line Items] |  |
Remaining net operating loss carryforwards | 227,817,000 |
State [Member] |  |
Income Taxes. (Details) [Line Items] |  |
Remaining net operating loss carryforwards | $ 211,680,000 |

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